西安电子科技大学雷达信号处理国家重点实验室,西安,710071
纸质出版:2001
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张子敬, 焦李成. M带余弦调制滤波器组的设计[J]. 电子学报, 2001,29(1):84-86.
ZHANG Zi-jing, JIAO Li-cheng. Design of M-Band Cosine-Modulated Filter Banks[J]. Acta Electronica Sinica, 2001, 29(1): 84-86.
本文提出了一种近似重构的
M
带余弦调制滤波器组的设计方法.该方法将原型滤波器表示成
A(z
L
)B(z)
的形式
通过优化低阶FIR滤波器
A(z)
的通带边缘频率
间接设计原型滤波器.在优化过程中
采用常用的Parks-McClellan算法设计滤波器
A(z)
.文中给出的设计例子表明
该方法可获得很高阻带衰减的滤波器组.
A method for designing
M
-band cosine-modulated filter banks with near perfect reconstruction is proposed.The prototype filter is formulated as the form
A(z
L
)B(z)
and indirectly designed by varying the passband edge of
A(z)
with low order.In the course of the optimization procedure
the popular Parks-McClellan algorithm is used to design
A(z)
.A design example is presented to show that cosine-modulated filter banks with high stop attenuation can be achieved using the proposed method.
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